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Posted on Jan 02, 2017
SOURCE: location of crankshaft sensor
Hello mitchoreb: My name is Roger and I will be glad to help with your answer. You will need to raise the vevicle in order to see the sensor. Make sure to use safety stands when ubder the vehicle when raised up.Look in the area behind the oil filter.Just in front of the knock sensor.This will be just above the oil pan rail.The knock sensor is a round sensor with a round plug.The crank sensor should hove a oblong plug. You should have a picture along with this reply. Should you need any further help please just ask. Please rate the answer you received as this way we know you recived helpful information. Thank You for using FixYa.Roger
Posted on May 09, 2009
. Its above the starter going into the side of the block. (front side of the engine) Disconnect the battery. Remove the starter. Remove the wIre CONNECTOR plug to the sensor. The sensor has 1 bolt holding it in. Remove the bolt, you may have to wiggle the sensor at the base a bit as you pull it out. Replace, and make sure it is pushed in all of the way. Replace the bolt, wire plug, starter, reconnect the battery.
Posted on Jun 05, 2010
The crankshaft position sensor (POS) is located on the oil pan facing the gear teeth (cogs) of the signal plate. It detects the fluctuation of the engine revolution.
After replacement, ECM reprogramming is required.
This vehicle may be subject to voluntary recall, CAMPAIGN I.D. # R0606, that involves the crankshaft position sensor:
Quote: Nissan has determined that on some 2003 - 2004 Altima and Sentra vehicles with the 2.5 liter engine the operation of the crank angle sensor is significantly affected by variations in temperature that occur due to the unique location of the sensor in the engine. Under certain driving conditions, these variations in temperature can be large enough to cause a brief interruption in the signal output from the sensor. If the interruption in the signal from the sensor is so brief that the Electronic Control Module (ECM) logic does not have time to diagnose the condition, the engine may stop running without warning while the vehicle is driven at low speed.
Posted on Jun 29, 2010
Crankshaft sensor is located on the right side of the cylinder block behind or under the starter. It is fitted into the rear crankshaft oil seal hausing
Posted on Sep 12, 2010
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